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net: hns3: add support for RX completion checksum

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In some cases (for example ip fragment), hardware will
calculate the checksum of whole packet in RX, and setup
the HNS3_RXD_L2_CSUM_B flag in the descriptor, so add
support to utilize this checksum.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Huazhong Tan 2020-11-28 11:51:44 +08:00 committed by Jakub Kicinski
parent 9e39394fae
commit 4b2fe769aa
3 changed files with 29 additions and 0 deletions
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21
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
View File

@ -2798,6 +2798,22 @@ static int hns3_gro_complete(struct sk_buff *skb, u32 l234info)
return 0;
}
static void hns3_checksum_complete(struct hns3_enet_ring *ring,
struct sk_buff *skb, u32 l234info)
{
u32 lo, hi;
u64_stats_update_begin(&ring->syncp);
ring->stats.csum_complete++;
u64_stats_update_end(&ring->syncp);
skb->ip_summed = CHECKSUM_COMPLETE;
lo = hnae3_get_field(l234info, HNS3_RXD_L2_CSUM_L_M,
HNS3_RXD_L2_CSUM_L_S);
hi = hnae3_get_field(l234info, HNS3_RXD_L2_CSUM_H_M,
HNS3_RXD_L2_CSUM_H_S);
skb->csum = csum_unfold((__force __sum16)(lo | hi << 8));
}
static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
u32 l234info, u32 bd_base_info, u32 ol_info)
{
@ -2812,6 +2828,11 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
if (!(netdev->features & NETIF_F_RXCSUM))
return;
if (l234info & BIT(HNS3_RXD_L2_CSUM_B)) {
hns3_checksum_complete(ring, skb, l234info);
return;
}
/* check if hardware has done checksum */
if (!(bd_base_info & BIT(HNS3_RXD_L3L4P_B)))
return;

7
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
View File

@ -82,6 +82,12 @@ enum hns3_nic_state {
#define HNS3_RXD_STRP_TAGP_S 13
#define HNS3_RXD_STRP_TAGP_M (0x3 << HNS3_RXD_STRP_TAGP_S)
#define HNS3_RXD_L2_CSUM_B 15
#define HNS3_RXD_L2_CSUM_L_S 4
#define HNS3_RXD_L2_CSUM_L_M (0xff << HNS3_RXD_L2_CSUM_L_S)
#define HNS3_RXD_L2_CSUM_H_S 24
#define HNS3_RXD_L2_CSUM_H_M (0xff << HNS3_RXD_L2_CSUM_H_S)
#define HNS3_RXD_L2E_B 16
#define HNS3_RXD_L3E_B 17
#define HNS3_RXD_L4E_B 18
@ -371,6 +377,7 @@ struct ring_stats {
u64 err_bd_num;
u64 l2_err;
u64 l3l4_csum_err;
u64 csum_complete;
u64 rx_multicast;
u64 non_reuse_pg;
};

1
drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
View File

@ -55,6 +55,7 @@ static const struct hns3_stats hns3_rxq_stats[] = {
HNS3_TQP_STAT("err_bd_num", err_bd_num),
HNS3_TQP_STAT("l2_err", l2_err),
HNS3_TQP_STAT("l3l4_csum_err", l3l4_csum_err),
HNS3_TQP_STAT("csum_complete", csum_complete),
HNS3_TQP_STAT("multicast", rx_multicast),
HNS3_TQP_STAT("non_reuse_pg", non_reuse_pg),
};